Uptake,accumulation,translocation and transformation of organophosphate esters(OPEs)in plants:A review
The fate and environmental behavior of organophosphate esters(OPEs)have gained more attention because OPEs was detected frequently in variety of environmental media and have potential adverse effects on ecosystem and humans.Plants as the main part in terrestrial food chain is one of the most important sinks for pollutants in environment.The understanding of uptake,accumulation,translocation and transformation of OPEs in plants is critical to evaluate their ecological risk and manage their use scientifically.The uptake,accumulation and translocation of OPEs in plants and transformation pathways summarized based on recent researches in this paper.The prospective researches in the future was also proposed.OPEs absorbed by roots mainly through passive diffusion,which influenced by the octanol-water partition coefficient(Kow).OPEs with lg KOW values ranging from 3.5 to 9.5 could be absorbed more easily by root.OPEs with lg Kow＜3 could translocate more easily in the plant xylem and phloem.The physicochemical properties of OPEs,plant physiological characteristics and environmental factors could influence the uptake,accumulation and translocation of OPEs in plants.Hydrolysis was the primary transformation pathway of OPEs in plants.Acid phosphatase was the key enzyme involved in the hydrolysis of OPEs,and cytochrome P450 and glutathione S-transferase also effectively promoted the transformation of OPEs in plants.
万方数据
维普
